<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function a_plus_b(form) {
a=eval(form.a.value)
b=eval(form.b.value)
c=a+b
form.ans.value = c
}
function a_minus_b(form) {
a=eval(form.a.value)
b=eval(form.b.value)
c=a-b
form.ans.value=c
}
function a_times_b(form) {
a=eval(form.a.value)
b=eval(form.b.value)
c=a*b
form.ans.value=c
}
function a_div_b(form) {
a=eval(form.a.value)
b=eval(form.b.value)
c=a/b
form.ans.value = c
}
function a_pow_b(form) {
a=eval(form.a.value)
b=eval(form.b.value)
c=Math.pow(a, b)
form.ans.value = c
}
// End -->
</script>
</head>
<body>
<center>
	<form name="formx">
		<input type=text size=4 value=12 name="a" />
		<input type="button" value="  +  " onClick="a_plus_b(this.form)" />
		<input type="button" value="  -  " onClick="a_minus_b(this.form)" />
		<input type="button" value="  x  " onClick="a_times_b(this.form)" />
		<input type="button" value="  /  " onClick="a_div_b(this.form)" />
		<input type="button" value="  ^  " onClick="a_pow_b(this.form)" />
		<input type="number" size=4 value=3 name="b" />
		=
		<input type "number" value=0 name="ans" size=9 />
	</form>
</center>
</body>
</html>
